Automatic start and stop device



May 5, 1925.

S. KOHN AUTOMATIC START AND STOP DEVICE Filed April 25, 1923 3 Sheets-Sheet 1 A TTORNE Y May 5, 1925.

S. KOHN AUTOMATIC START AND STRDEVICE Filed April 25, 1925 3 Sheets-Sheet 2 flew ATTORNEY May 5, 1925. 1,536,298

s. KOHN AUTOMATIC START AND STOP DEVICE Filed April 25, 1923 3 Sheets-Sheet I5 nnn "MIMI- 5,5}; g IN V EN TQR TT ORNE Y Patented May 5, 1925.

SAMUEL norriv, or new roan, n. Y.

AUTOMATIC START AND STOP DEVICE.

Application filed April 25, 1923. Serial No. 634,494.

To all whom it may concc'm: Be it known that I, SAMUEL KoHN, citizen of the United States, and resident of New York, in the county of New York and State of New York, have invented certain new and useful Improven'ients in Automatic Startand Stop Devices, of which the following is a specification. V

Thisinvention relates to automatic startand-stop mechanism for phonographs and is an improvement of my invention disclosed inmy co-pending application filed June 16, 192:2, Serial No. 568,045.

One of the objects of this invention is the provision of a StOP'lllGCllftlllSll] normally operative but rendered inoperative by the movement of the tone arm across the record and until the stylus has reached the last sound convolution in the record at which time it becomes operative tostop the phonograph. 7

Another object is the provision ofnovel means for automatically stopping the phonograph when the selection on the record has been played, without the use of the usual brake or retaining levers for the brake.

Another object is to provide a start andstop mechanism which does not depend upon frictional contact with the tone arm or parts connected thereto.

Still another object is to provide a device whichis simple in construction, inexpensive to manufacture, composed of few parts and one vwhich will automatically stop the phonograph when the end of the selection is reached regardless of variations in the pitch of the sound'groove of the record used and no matter how long or how short the selee tion may be. i inother object is to provide means whereby automatic non-set stops for phonographs may be rendered inoperative to stop the phonograph whenever the tone arm is moved rearwardly of the record as when the stylus is being moved to a prior position on the record while the phonograph is playing.

Still another object is the provision of means for absorbing sudden shocks that may result from suddenly stopping the motor.

Still another object is the provision. of

n'u'ians to disengage the stop mechanisn'i to start the phonograph while the tone arm is being moved fromits extreme or fully extended position, toward the initiallines of the record.

Still another object the provision of means to disengage the stop mechanism to start the phonograph when the tone arm is moved from a position beyond but adjacent the turntable, in either direction toward the initial lines on the record or to its eX- treme outward position. i i

I am aware that non-set-stops have been made before and thattheir essential purpose has been to cause the turn tableto stop when the tone arm had ceased to advance. In fact in the phonogra iih stops of this type constituting the prior art, it is impossible to move the stylus backward from any advance position to any prior position on the record without causing the turn table to stop and this is so because no provisions had been made to disengage the stopmechanism while the tone arm was being moved in a backward direction. In other words, if the forward movement of the tone arm be interrupted or if it be lifted and moved in any dir ction other than theforward direction, the mechanism would operate to stop the turn table. Hence one of the prime objects of the present invention is to overcome this stopping of the turn table upon movement of the tone arm hackwardly' and to provide instead means to enable the operator to lift the stylus from any position on and combinations hereinafter to be described and moreparticularly pointed out in the claims.

In the accompanying drawings forming a part of this specification:

Figure 1 is a plan view of an embodiment of my invention showing the relation of parts immediately after the stopping mechanism has been disengaged to start the phonograph. y Figurei is a similar View showing the re lation of parts when the stop mechanism operates to stop the phonograph.

Figure 3 is a similar view showing the relation of the parts immediately after the stylus has been raised from the record and moved to a prior position for repeating a portion thereof.

lit)

Figure 4- is a perspective view showing an embodiment of my invention in combination with a modified abutment.

Figure 5 is a section on line 55 of Figure 4.

Figure (l is a plan view o1? a modified embodiment of my invention, parts being broken away for clearness.

Figure 7 is a transverse sectional view showing a modified frictional connection between the rotating arm and the driving mechanism.

Figure 8 is a sii'nilar view showing detail of the alternative starting mechanism.

Figure 9 is a sectional view taken on line S i) oi Figure Only so much of the phonograph elements are illustrated as is necessary for proper understanding oi the invention and are represented by the turn table it) operated in the usual manner on the turn table shaft 11 by the usual motor (not shown). The tone arm 12 carries the usual sound box or reproducer l3 and the stylus needle 1%, which, when the machine is in operation is swung inwardly'by the spiral sound convolution of the usual record disc 15. An embodiment of the present invention is shown as applied to a phonograph and consists of the gear 16 meshing with and operated by the pinion 1? tixedlyattached to the turn table shaft 11, the gear 16 being keyed or otherwise fastened to the lower end of a shaft 18 journaled for tree rotary movement in a hearing 18 on the supporting plate 19 which is mounted upon the motor board and secured to it with screws or other fastening means. Upon the upper end of shaft 18 is fixedly mounted an arm 20 which obviously is propelled by the turn table shaft through the agency of the pinion l7 and the gear 16.

Beneath the arm 20 and slightly trictionally engaging a raised annular shoulder 21 on the plate is a support 22 the free end of which carries a loosely pivoted plate 23 upon which pivoted an operating lever 24, one end of which. co-acts wita the downturned end oi? an arm fixedly attached to the tone arm 12. The other end of the lever 2st is provided with an extension 26 for coaction with the rotating arm and the abutment 27.

The plate 23 is provided with an arcuate slot 28 terminating at one end in an enlarged recess 29, the purpose for which will presently appear. The plate 23 is also provided with a limiting stop 30 to abut and co-act with an arm 31 extending "from the support The support 22 is 'turther provided with. two limiting members 32 and 32-3 struck up from the support.

In operation the device works as follows:

Referring now to Figure 1 of the drawing the relation of the parts are shown immediately after the phonograph has been started. The tone arm having been moved to the right to its fully extended position, has carried the arm to the end of the arcuate slot 28 and caused the plate 23 to turn on its pivot 36, thus withdrawing the operating lever 2% from between the rotating arm 20 and the abutment 27, and permitting the phonograph to rotate, under the influence of the pinion 11 and the gear 16, the arm 20. The stylus, then being placed upon the record in the usual manner, advances a short distance toward the centre of the record during which time the end of the arm 25 moves through the arcuate slot 28 toward the enlarged recess 29 and contacts with the end or tongue 34 of the operating lever 24 whereupon -lfurther advance causes the lever to turn about its pivot 24; until the extension 26 is brought into the path 01" the rotating arm 20, at which time the arm 20 will cam the operating lever 24: out of its path. But due to the fact that the tonne 34 of this lever is resting against the arm 25 it must necessarily use the arm 25 as a fulcrum and turn the plate 23 about its pivot 36, gradually closing the gap between the stop and the extension 31. During the next rotation of the arm 20, the tone arm while normally advancing, is again turning the lever 24-. about its pivot and again presents the extension 26 into the path of the rotating element which again kicks it out of its path in the same manner. However, when the gap between the elements and 31 is finally closed and the re tating arm again kicks the extension 26, the plate 28 being unable to move further about its pivot, causes the support 22 to be moved about its pivot 21. The relation of the parts in this latter position is shown more clearly in Figure 4-. It will be obvious of course that when the arm 20 has kicked the extension 26 out of its path to permit it to rotate, it has caused the opposite edge 35 oi the lever 26 to be presented into its path.

and unless the lever were moved again, the rotating arm would upon the next revolution contact with it, and move the lever against the abutn'ient 27 and stop the machine. Vi e have in. el'lect, a floating support which is being intermittently advanced about its pivot by the cannning of the rotating arm. hen the tone arm ceases to move by reason or the stylus having reached the last sound convolution in the record, the lever 24 will no longer be turned on its pivot by the arm 25, and hence when the rotating arm 20 makes another rerolution, it will contact with the edge 2% oi? the lever and move it against the abutnwnt 27, thus preventing further rotation of the arm, and incidently of the turn table, all oi which is clearly shown in Figure 2 oi the dra wing.

Suppose now it is desired to change the record or to repeat the entire selection upon the record; then it is but necessary to lifting a downturnedarm 4.3 on thefree end of thetone arm in the usual manner and swing sameoutwardly causing the support 22 to be moved about its pivot until the "arm 25 can free itself from the recess 29 and pass into the arcuate slot 28 at which time the support 22 ceases to turn and the arm 25 is free to move through the arcuate slot until the reproducer and stylus are entirely removed from the record. lhe arrangement is such however that this movement will not withdraw the lever 2 from between the rotating arm and the abutment 2'? until the tone arm has beenmoved to its fully extended or extreme position as previously described.

Supposing now that after a considerable part of the selection has been played, it is.

ertoire, then it is but necessary to lift the re nroducer and stylus from the record, and

move it outwardly toward any prior position on the record, replacing the stylus again upon any desired spot. In doing thisho-wever, the moment the stylus is lifted from the record and the tone arm moved in a backward direction, the arm bears against the edge of the recess 29 thus turning the plate 23 on itspivot 36, and withdrawing the operating lever 24 from the path ofthe rotating arm 20. It will be obvious of course that when the tone. arm has been moved in a backward direction, it migltit be held suspended above the record for any length of time in an absolutely motionless position without effecting the rotation of the turn table or the motor, and of course it is i also obvious that just as soon as the tone arm is again moved in a forward direction as by replacing the stylus uponthe record, the arm 25 will again rock the lever on its pivot and again present the extension QGinto the path of the rotating arm 20 to OPQITtItB 2IS before. Figure 3 shows the relation of parts inunediau'lely after i the tone arm has been moved in a reverse direction to repeat a portion of the selection on the record.

lInFigures 1, 2 and 3 above described I have shown merely one adaptation of my in vention in connection with non-set automatic phonograph stops in which arigid abut ment 2'? is used. It is obvious however, that this abutment need not be rigid, but on the contrary might be movable; one example of such movable abutment being shownin Figure 4 of the drawing in whichall. of the elements shown are similar to those in Figures 1, 2 and 3 with the exception of the rigid abutment 27 which has substituted for it what I term a movable abutment 40 which. in effect a bell crank lever, loosely pivoted to the base plate 19, as at 41 and having an upturned end d2 against which the erten si on 96 of the lever may abut, the other end havwhich is affixed a friction pad 414% for frictional engagement with the governor disc 4:5 of the motor.

When the lever 24; is interposed helwwen the rotating arm 20 and the eli-iment iil, it will turn the lever 40 on its pivot thus mov-' ing the governor disc to stop the phonograph. It will also be noted that while the movement of the governor disc itself would be sufiicient to stop the phonograph, nevertheless the arrangement of the operating lever 24 is such that the motor is positively locked against movement in forward direction. It might also be noted that during normal playing movement, the power which drives the phonograph is utilized to stop the phonograph when the tone arm ceases to move in a forward direction.

Still another modification or embodiment of my invention is shown in Figures (3, 7 and 8 of the drawing in which I show a support, an operating lever, a rotating arm, an abutment and a pivoted plate substai'itially similar in all respects to those shown in F igures 1, 2 and There are however, two changes in this form of construction or modification of my invention. In the form of my invention described in Figures 1, 2, and 3, there might be a shock on the motor when the phone graph is stopped and if preferred ll might use the method shown in Figure 7 for ab: sorbing this shock'by obviating the rigid connection between the rotating arm 20 and the shaft 18 in the following manner.

The bushing of the supporting plate 19 is bored internally for a larger diame-' ter than the shaft so as to enable the shaft 18 to be surrounded with a helical spring 51 which bears on a shoulder 52 on the shaft and exerts pressure between that shoulder and the shouldered bushing 53 througggh which' the shaft 18 projects. llhe top of the shaft being bored and internally threaded to receive the shank of a screw 54: which serves to retain therotating arm 20 in position be tween itself and the collar 53. It will be seen that this rotating arm is frictionally gripped due to the tension. on the spring 51 so that ordinarily during the movement of the phonograph, the rotating arm is propelled through the agency of the pinion and gear; however, when the operating lever 24%. is interposed between the rotating arm and the abutment, the rotating arm will be arrested, but due to the frictional engagewith this modification that while in the forms shown in Figures 1, 2, 3 and 4 it was necssary 1n order to start the phonograph to move the tone arm to its fully extended position, in the present modification I have provided an alternative means for starting the phonograph upon the inward 1-nove ment of the tone arm toward the record from any position beyond, but adjacent the turn. table as well as the means for starting the phonograph by moving the tone arm to its fully extended position.

I accomplish this by providing a lever 60 loosely pivoted to to the motor board or to an extension of the base plate 19 and one end of this lever has an upturned bifurcated extension, one branch of which is adapted to engage in the arcuate slot 28 ot the plate 23, the other branch of which is adjacent the outer margin of the plate s8. Mounted on the same pivot is a latch or detent 62, the end of which projects into the path of the bracket 25 on the tone arm. A pin is provided to limit the forward movement of the latch 62 and a spring is interposed between the extending arms on the lever and the detent for the purpose of keeping the detent normally in contact with the pin 63. The arrangement is such that when the tone arm is moved backwardly and the bracket 25 passes through the arcuate slot, it will contact with and turn the detent 62 on its pivot against the tension of the spring G l, the branch 61 bearing against the outer margin of the plate to prevent rotation of the lever 60.

Now, when it is desired to start the phonograph, presuming of course that the operating lever is interposed bet-ween the rotatin'g arm 20 and the abutment 2? as shown in Figure 2 of the drawings, instead oi": it being necessary to move the tone arm to its fully extended position as previously described with the other modifications, it is but necessary to bring the tone arm for ward toward the center and place it on the first line of the record ready 'lor reprodurtion. It will be noted that this 'liir'waa'd n'iovement of the tone arm will cause the bracket 25 to abut against the straight side oi the detent G2, and due to the tact that this detent engages the pin (33, it will cause the le ver 60 to turn about the common pivot and by this movement, due to the engagement oi the branch in the arcuate slot, will cause the plate 23 to turn about its pivot and withdraw the operating lever Q from between the rotating arm and the abutment thus permitting the phonograph to start under the influence of the motor.

It will be understood that l have disclosed herein the best forms oi my invention now known to me, but these forms are to be taken as merely typical of numerous con structions in which the principle of my invention may be embodied and I reserve the right to make changes in shape, size and arrangement of the parts to the full extent indicated by the general or broad meaning of the terms in which the claims are ex pressed.

Having thus described my invention what I claim and desire to secure by Letters latent is 1. The combination with automatic nonse't phonograph steps of means for reneering the stopping mechai iism inoperative during-any rearward movement of the phonograph tonearm.

2. The combination with auton'iati-c nonse't phonograph stops of means for rendering the stopping mechanism. inoperative during any rearward movement of the phonegraph tone arm, and for maintaining said stopping mechanism inoperative until said tone arm is again moved forwardly.

3. An automatic stop mechanism for phonographs comprising a rotating arm positively propelled by the pho'nograpl'i motor, a lever, an. abutn'ient, means for automatically interposing one end of the lever between the rotating arm and the abutmei'rt. and means for withdrawing the lever from the path of the rotating arm d urii'ig any rearward movement of the tone arm.

4. In combination with a rota-ting element and a swinging element, a rotating arm positively engaging and propelled by the rotating elen'ien't, a lever, an abutment, and means for automatically interposing one end of the lever between the rotating arm and the abutment to stop said arm, and means for rendering said last named means inoperative during any rearward movement of the swinging element.

In combination with a rotating element and a swinging element, a rota tingarm positively engaging and propelled by the rotating'elem'ent, a lever, an-abutment, and means for automatically interposing one end at the lever between the rotating arm a ml the abutment to stop said arm, means for rendering said last named means inoperative during any rearward movements of the swii ing element and to maintain it inoperative until the swinging elemei'it again n'mvi-d forwardly.

6. 'lhe'combination with a phonograph ot a revoluble member propelled by the phonograph motor, a lever, a floating support for the lever and an alDLlt HIC-Dt'; means for turning the lever on its pivot (hiring the normal movement of the tone arm and means adapted to interpose the lever between the revoluble member and the abutment only when the last sound colrvolution on the record is reached.

'4'. In combination with a rotating element and a swinging element, a rotating arm propelled by the rotating element. a lever, an abutment, means for automatically interposing one end of the lever between the rotating arm and the abutment to stop said arm ill) CJI

i stop mechanism operable to stop the phone graph and means rendering said stop mechanism inoperative during any rearward movement of the tone arm,'and maintaining it inoperative until the tone arm is again moved forwardly.

10. The combination with a rotating elementand a swinging element, means operable when the swinging element ceases to advance to intercept the rotating element and stop it, and means for rendering such last named means inoperative it the swinging element be moved rearwardly.

11. The combination with a rotating element and a swinging element, of means operable when'the swinging element ceases to advance to intercept the rotating element and stop it, and means for rendering said last named means inoperativeit the swinging element be moved rearwardly, and until the swinging element is again moved forwardly.

12. The 'combinationwitha rotating element and a swlngmg element, of a loosely pivoted lever having a migratory pivot, an

abutment, means rotated by the rotating elcment adapted to ooact with the lever and the abutment when the swinging element ceases to advance, to stop the rotating element, and means for preventing said coaction it the swinging element be moved rearwardly.

13. The combination with rotating element and a swinging element, of a loosely pivoted lever having a migratory pivot, an abutment, and means rotated by the rotating element adapted to coact with the lever and the abutment when the swinging element ceases to advance to stop the rotating ele ment, and means, it the swinging element be moved rearwardly, to prevent said coaction until the swinging elen'ient is again moved forwardly.

14. Thecombination with a rotating element and a swinging element, ot a startand-stop mechanism adapted z-iutomatically to stop the rotating element. when the swing .ing element ceases to, advance and to start the rotating element when the. swinging element is moved either outwardly to its extreme position or inwardly from a position beyond but ad acent to the rotating element.

lever and an abutment, said mechanism be ing adapted automatically to stop the rotating element when the swinging eleniient ceases to advance, and to start the rotating element when the switwin v element is moved either outwardly to its extreme position, or

inwardly itron'l a posit-ion beyond but adjacent to the rotating element.

16. The combination with automatic nonset phonograph stops, of means for starting the phonograph by movement of the tone arm to its extreme outward position and alternative means for startingthe phonograph by i'novement ot the tone arm from a position beyond but adjacent the record disc toward the first lines on the record. 17. The combination with a phonograph, of an automatic start-andstop mechanism having means for rendering the stop mecha nism inope ative during any rearward movement of the tone arm and means for starting the phonograph by movement of the tone arm to its extreme outward position. i

18. The combination with a phonograph, of an automatic start-and-stop mechanism having means for rendering the stopping mechanism inoperative during any rearward movement of the tone arm and until the tone arm is again moved forwardly, and means movement of the tone arm, means for starting the phonograph by movement of the tone arm to its extreme outward position and alternative means for starting the phonograph by movement of the tone arm from a position beyond but adjacent the record disc, to the first lines on the record.

20. The combination with a phonograph, of an automatic start-and-stop mechanism havingmeans for rendering the stopping mechanism inoperative during any rearward movement oil? the tone arm, and alternative means for starting the phonograph by movement of the tone arm in either direction from. a position beyond but adjacent the turntable.

21. The combination with a phonograph, o'l. an automatic.start-and-stop mechanism having means for rendering the stopping mechanism inoperative during any rearward movement of the tone arm and until the tone arm is againmoved forwardly, and alternative means for starting the phonograph by movement: of the tone arm in either direction from a position beyond but adjacent the turntable.

22. The combination with a phonograph having an automatic nonset stop mechanism, of alternative means for starting the phonograph by either an inward or outward movement of the tone arm from a position beyond but adjacent the record disc.

An automatic nonset stop mechanism for phonographs comprising a rotating arm propelled by the phonograph motor, a pivoted support, a plate pivoted to said sup port, a lever pivotally carried by said plate andadapted when the tone arm ceases to advance to intercept the rotating arm to stop the machine.

24. An. automatic nonset stop mechanism for phonographs comprising a rotating arm propelled by the phonograph motor, a pivoted support, a plate pivoted to said support, a lever pivotally carried by said plate and adapted when the tone arm ceases to advance to intercept the rotating arm to stop the machine, and means to prevent the stopping of the machine if the tone arm be moved rearwardly.

25. An automatic stop mechanism for phonographs, comprising a rotating arm propelled by the phonograph motor, a pivoted support, a plate pivoted to said support, a lever pivotally carried by said plate and adapted. when the tone arm. ceases to advance to intercept the rotating arm to stop themachine, means to prevent the stopping o t the machine if the tone arm be moved rearward ly, and until" the tone arm is again moved forwardly.

26. The combination with a rotating element and: a swinging-element, of a rotating maaaee arm positively propelled by the rotating element, a lever, a braking lever and means for automatically interposing one end of the lever between the rotating arm and the braking lever.

27. The combination with a rotating element and a swinging element, of a rotating arm positively propelled by the rotating element, a lover, a braking lever and means for automatically interposin one end of the lever between the rotating arm and the braking lever to stop the phonograph and to lock it against forward movement.

28. The combination with a rotating ele- .ment and a swinging element, of a rotating arm positively propelled. by the rotating element, a lever, a braking lever, means for automatically interposing one end of the lever between the rotating arm and the brating lever, and means to prevent such interposition it the swinging element be moved rearwardly and until the swinging element is again moved forwardly.

29. The combination with a stopping mechanism "for phonographs, of means tor employing the power of the driving element 01 a motor to positively prevent its own operation.

30. The combination with a phonograph, of an automatic nonset stop mechanism adapted to stop the phonograph when the tone arm ceases to. advance and to positively lock the turntable against forward movement.

Signed at New York, in the county of New York and State of New Yorlr this 24th day of April, A. D. 1923.v

SAMUEL. KOl-IN. 

